<template>
	<view>
		<my-search @myclick="gotoSearch" ></my-search>
		<!-- <my-search :bgcolor="'pink'" :radius="12"></my-search> -->
		<view class="scroll-view-container">
			<!-- 左侧的滚动视图区域 -->
			<scroll-view class="left-scroll-view" scroll-y :style="{height: wh + 'px'}">
				<block v-for="(item,i) in cateList" :key="i" >
					<view :class="['left-scroll-view-item',i === active ? 'active' : '']" @click="activeChangec(i)">{{item.cat_name}}</view>
				</block>
			</scroll-view>
			<!-- 右侧的滚动视图区域 -->
			<scroll-view class="right-scroll-view" scroll-y :style="{height: wh + 'px'}" :scroll-top="scrollTop">
				<view class="cate-lv2" v-for="item2,i2 in cateLevel2" :key="i2">
					<view class="cate-lv2-title">
						/ {{item2.cat_name}} /
						<view class="cate-lv3-list">
							<view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
								<image :src="item3.cat_icon" mode=""></image>
								<text>{{ item3.cat_name }}</text>
							</view>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>
<script>
	export default {
		data() {
			return {
				//当前设备可用高度
				wh: 0,
				cateList:[],
				active:0,
				cateLevel2:[],
				scrollTop:0
			};
		},
		onLoad() {
			const sysInfo = uni.getSystemInfoSync().windowHeight
			this.wh = sysInfo - 50
			this.getCateList()
		},
		methods:{
			async getCateList(){
				const {data:res}=await uni.$http.get('/api/public/v1/categories')
				if (res.meta.status != 200) return uni.uni.$showMsg()
				this.cateList = res.message
				this.cateLevel2=res.message[0].children
			},
			activeChangec(i){
				this.active=i
				this.cateLevel2=this.cateList[i].children
				this.scrollTop = this.scrollTop ===0 ? 1 : 0
			},
			gotoGoodsList(item){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid=' + item.cat_id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
	.scroll-view-container {
		display: flex;

		.left-scroll-view {
			width: 120px;

			.left-scroll-view-item {
				line-height: 60px;
				background-color: #f7f7f7;
				text-align: center;
				font-size: 12px;

				&.active {
					background-color: #ffffff;
					position: relative;
					// 渲染激活项左侧的红色指示边线
					&::before {
						content: ' ';
						display: block;
						width: 3px;
						height: 30px;
						background-color: #c00000;
						position: absolute;
						left: 0;
						top: 50%;
						transform: translateY(-50%);
					}
				}
			}
		}
	}
	.right-scroll-view{
		background-color:#ffffff ;
	}
	.cate-lv2-title{
		font-size: 12px;
		font-weight: bold;
		text-align: center;
		padding: 15px 0;
	}
	.cate-lv3-list{
		display: flex;
		flex-wrap: wrap;
		.cate-lv3-item{
			width: 33.33%;
			display: flex;
			flex-direction:column;
			justify-content: center;
			align-items: center;
			margin-bottom: 10px;
			image{
				width: 60px;
				height: 60px;
			}
			text{
				font-size: 12px;
			}
		}
	}
</style>